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The 1769-ECR is an essential termination component for the Allen-Bradley CompactLogix control system architecture. Designed as a Right End Cap, this module serves as the final bus terminator for the FlexBus backplane, completing the...
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The 1769-ECR is an essential termination component for the Allen-Bradley CompactLogix control system architecture. Designed as a Right End Cap, this module serves as the final bus terminator for the FlexBus backplane, completing the electrical circuit required for stable communication between the controller and connected I/O modules.
Proper installation of the 1769-ECR is mandatory for every CompactLogix assembly. By terminating the FlexBus circuitry, it ensures signal integrity, reliable data transfer, and proper system operation across the entire controller bank. Without the end cap installed, the CompactLogix system will not function correctly.
Built for industrial environments, the module features a rugged housing and secure mechanical interface that provides a vibration-resistant termination point for the control rack. The unit operates reliably within a 0°C to 60°C temperature range and is designed to withstand high shock and vibration levels commonly found in heavy manufacturing environments. With a minimal current draw of only 5 mA at 5.1 VDC, the module adds negligible load to the system power budget.
| Parameter | Specification |
|---|---|
| Model Identification | 1769-ECR |
| Product Line | CompactLogix |
| Module Type | Right End Cap / Bus Terminator |
| Function | FlexBus circuitry termination |
| Power Consumption | 5 mA at 5.1 VDC |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Weight | 0.06 kg |
CompactLogix System Finalization
Acts as the mandatory physical and electrical terminator for every CompactLogix rack assembly, ensuring proper FlexBus operation.
Cabinet Retrofitting and Maintenance
Used to replace missing or damaged bus terminators, restoring system stability and eliminating configuration or communication faults.
High-Vibration Industrial Installations
Provides a secure termination point for controller banks installed in machinery enclosures, heavy equipment control panels, and high-vibration environments.
Is it safe to install or remove the 1769-ECR while the system is powered?
No. The 1769-ECR must only be installed or removed when system power is completely disconnected. Removing or installing the module while powered can trigger a controller fault and immediate system shutdown.
How can I verify the module is properly engaged?
Ensure the bus lever is fully locked after aligning the module with the guide slots. If resistance occurs while closing the lever, do not force it. Remove the module, verify correct alignment with the CompactLogix side connector, and re-seat the module carefully.
